linux-kernel - [PATCHv3] arm64: dts: meson: Enable active coling using gpio-fan on Odroid N2/N2+

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Date:   Sat, 22 Oct 2022 08:47:34 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Anand Moon <linux.amoon@...il.com>,
        Dan Johansen <strit@...jaro.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCHv3] arm64: dts: meson: Enable active coling using gpio-fan on Odroid N2/N2+

Odroid N2/N2+ support active cooling via gpio-fan controller.
Add fan controls and tip point for cpu and ddr thermal sensor
on this boards. Drop bias-disable from set pwm_ao_d_10 the pin
as to allow transition from say pull-up to pull-down for on/off
of the fan.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: changes tip name cpu-active --> ddr-active
v3: drop bias-disable for pwm_ao_d_10 pine.
---
 .../boot/dts/amlogic/meson-g12-common.dtsi    |  1 -
 .../dts/amlogic/meson-g12b-odroid-n2.dtsi     | 42 +++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
index 45947c1031c4..10a09fe362fa 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
@@ -1982,7 +1982,6 @@ pwm_ao_d_10_pins: pwm-ao-d-10 {
 						mux {
 							groups = "pwm_ao_d_10";
 							function = "pwm_ao_d";
-							bias-disable;
 						};
 					};
 
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
index fd3fa82e4c33..667d2b774924 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
@@ -39,6 +39,14 @@ emmc_pwrseq: emmc-pwrseq {
 		reset-gpios = <&gpio BOOT_12 GPIO_ACTIVE_LOW>;
 	};
 
+	fan: gpio-fan {
+		compatible = "gpio-fan";
+		gpios = <&gpio_ao GPIOAO_10 GPIO_ACTIVE_HIGH>;
+		/* Using Dummy Speed */
+		gpio-fan,speed-map = <0 0>, <1 1>;
+		#cooling-cells = <2>;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -410,6 +418,40 @@ &cpu103 {
 	clock-latency = <50000>;
 };
 
+&cpu_thermal {
+	trips {
+		cpu_active: cpu-active {
+			temperature = <60000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&cpu_active>;
+			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
+&ddr_thermal {
+	trips {
+		ddr_active: ddr-active {
+			temperature = <60000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&ddr_active>;
+			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &ext_mdio {
 	external_phy: ethernet-phy@0 {
 		/* Realtek RTL8211F (0x001cc916) */

base-commit: 4da34b7d175dc99b8befebd69e96546c960d526c
-- 
2.38.0